Fill plastic water bottles a quarter of the way full and lay on the sides and put into freezer. This way when frozen you can fill with water and have ice cold
Freezing containers, Mr. Frosty, Nalgene® | VWR
PrincetonCryo | 7 Box Mini 2" Square Rack (Nalgene)
new and 15 year old nalgene : r/BuyItForLife
Plumbob 32 oz. Nalgene Bottle + Sticker Pack Bundle – The Sims Shop
Nalgene: More than just a water bottle – L.T. Hanlon
Plumbob 32 oz. Nalgene Bottle + Sticker Pack Bundle – The Sims Shop